Sharp R-24AT Signal to sound buzzer, 50Hz, Auto clear terminal, Power source voltage, Pin No

R-22AT

R-24AT

Pin No.

Signal

I/O

Description

19

P47

OUT

Signal to sound buzzer.

0.12 sec

This signal is to control the 2.5kHz

GND

A

-5V

continuous signal.

1.2 sec

1.2 sec

2.4 sec

A: Switch touch sound.

B

C

B: Guidance sound.

T

C: Completion sound.

200 sec.

200 sec.

20-21

P46-P45

-

Terminal not used.

22

P44

OUT

Oven lamp, Blower motor and Antenna motor driving signal (Square Waveform

: 50Hz).

During cooking

To turn on and off the shut-off relay (RY1).

The Square waveform voltage is delivered

H

to the RY1 relay driving circuit and

relays

L

(RY3, RY4, COOK RELAY) control circuit.

20 msec

23-24

P43-P42

-

Terminal not used.

25

INT1

IN

Signal synchronized with commercial power source frequency.

This is basic timing for all time processing of LSI.

OFF

GND

ON

-5V

20 msec.

26

INT0

IN

Connected to VC(-5) through pull-down resistor.

27

RESET

IN

Auto clear terminal.

Signal is input to reset the LSI to the initial state when power is supplied. Temporarily

set to "L" level the moment power is supplied, at this time the LSI is reset. Thereafter

set at "H" level.

28

P71

OUT

Memory (EEPROM) clock output.

29

P70

IN/OUT

Memory (EEPROM) data input/output.

30

XIN

IN

Internal clock oscillation frequency setting input.

The internal clock frequency is set by inserting the ceramic filter oscillation circuit with

respect to XOUT terminal.

31

XOUT

OUT

Internal clock oscillation frequency control output.

Output to control oscillation input of XIN.

32

VSS

IN

Power source voltage: -5V.

VC voltage of power source circuit input.

33

P27

IN

Signal coming from touch key.

When either one of G-12 line keys on key matrix is touched, a corresponding signal

out of P30 - P34 will be input into P27. When no key is touched, the signal is held at

"L" level.

34

P26

IN

Signal similar to P27.

When either one of G-11 line keys on key matrix is touched, a corresponding signal

will be input into P26.

35

P25

IN

Signal similar to P27.

When either one of G-10 line keys on key matrix is touched, a corresponding signal

will be input into P25.

36

P24

IN

Signal similar to P27.

When either one of G-9 line keys on key matrix is touched, a corresponding signal

will be input into P24.

37-40

P23-P20

OUT

Segment data signal.

The relation between signals and indicators are as follows:

Signal

Segment

Signal

Segment

Signal

Segment

P01

k

P21

h

P15

d

P02

j

P20

g

P14

c

P03

i

P17

f

P13

b

P23

LB

P16

e

P12

a

P22

UB

18